Appendix B
Interfacing to a Serial Device
©
National Instruments Corporation
B-3
Figure B-1 shows the location of the RS-232 connector.
Figure B-1.
Location of the RS-232 Connector
Interfacing the GPIB-232CV-A to a DCE with Handshaking
A correctly configured DTE-to-DCE interface is wired straight across:
GPIB-232CV-A TXD to DCE TXD, GPIB-232CV-A RXD to DCE RXD,
and so on as shown in Table B-2.
Table B-2.
Cable Wiring Scheme for GPIB-232CV-A DTE to Serial Device DCE
GPIB-232CV-A Signal to
DCE Serial Device Signal
Standard
DTE to DCE
9-pin
9-pin
Standard
DTE to DCE
9-pin
25-pin
RXD
to
RXD
1
2
to
2
2
to
3
TXD
to
TXD
1
3
to
3
3
to
2
DTR
to
DTR
4
to
4
4
to
20
GND
to
GND
1
5
to
5
5
to
7
RTS
to
RTS
7
to
7
7
to
4
CTS
to
CTS
8
to
8
8
to
5
1
The connections must be implemented.
PO
WER
READ
Y
TALK LISTEN
IEEE 488 Controller
RS-232
RS-232 Connector
GPIB Connector
DC Power Jack
(DC version only)
B
USY
FULL
GPIB-232CV-A
